As long as the face is cute (eyes & smile), the rest of her appearance doesn't really matter.
Well a single boob would be somewhat of a disappointment tho, but thats something else.
But if there was but a single choice, i'd still go for ugly and smart, because if it would get that far i'd probably be in a post-apocalyptic situation and if i had the chance to breed out stupidity for a better humanity i'd gladly sacrifice the looks for it.
But in general: cute face = win & smart = win, if i find that combo with some extra weight or annoying inlaws its fine with me!
And plastic surgery is just another form a stupidity, instead of buying off your guilt, your insecurity or your low self-esteem, you should try to fix the cause of those problems instead of trying to fix the outcome. How you feel about yourself is reflected upon those arround you. The more you think & say you're ugly, the more people will say & see you are. Its about presenting yourself, i mean if you apply for a new job the last thing you'll want to do is telling your potential boss that your are Mr. or Mrs. McWeaksauce, right?